Wegmans says in a blog post that it has been studying genetically modified organisms, or GMOs, for nearly two years. It also says it’s receiving an increasing number of questions from customers.

Some common GMO food crops are corn, soy, canola and sugar beets. GMO means the seeds have been scientifically altered to produce more crops, or be more resistant. It’s a controversial practice. Some see it as the future of food sustainability while others worry about food safety.